president obama and governor romney appear on stage together, at the university of denver, jim lehrer of pbs will be the moderator for what could be potentially the most indepth and lively debates in memory. we'll zero in on domestic policy with a new format that allows for more interaction between the two candidates and more time to discuss a single topic. let's go back to the debate hall. chief political correspondent candy crowley watching what's going on. you'll be the moderator in the next presidential debate. so you will watch this about as closely as anyone. >> absolutely, wolf. you know, this is, in fact, an arena that they use here at the university -- let me explain this picture this is president obama headed toward this debate site, we know that mitt romney is already here, and i -- obviously this is quite the happening, so you see a lot of folks out on the street. in fact, when we came in, people were hanging signs from the dorm rooms. this is an arena. i'm told it's used for ice hockey and sometimes basketball. tonight, it's pure politics. not a lot of big names or familiar face